Early stage of precipitation in steels studied by In-house small-sangle X-ray and neutron scattering

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360296
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Hokkaido University (2013-2014); National Institute for Materials Science (2012)
• Principal Investigator: OHNUMA Masato 北海道大学, 工学(系)研究科(研究院), 教授 (90354208)
• Co-Investigator(Kenkyū-buntansha): FURUSAKA Michihiro 北海道大学, 工学研究院, 教授 (60156966) ; OHBA Yojiro 京都大学, 原子炉実験所, 助教 (60566793) ; PING DeHai 物質材料研究機構, 先進構造材料ユニット, 主幹研究員 (80354207)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 小角散乱法 / 小型中性子源 / ラボ装置 / ナノ析出物

Outline of Final Research Achievements

Using both Small-angle X-ray (SAXS) and Neutron scattering (SANS), we confirm the formation of new phase with the diameter of 1nm and the change of their composition with increasing annealing temperatures in high nitrogen martensitic stainless steels . For this study, we have developed new compact SANS installed to the compact pulse neutron source in Hokkaido University. For evaluating the quality of the SANS profiles measured by in-house SANS, we comparing them to those measured by standard SANS which is installed in research reactor HANARO in Korea. The profiles measured by both SANS are perfectly same including absolute intensity level, indicating that the data obtained by in-house SANS are quantitatively correct. Above results of the formation of new phase is analyzed by the data obtained using in-house SANS. The in-house SANS can be powerful tools in the field of materials science.

Free Research Field

材料科学